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Western Digital (WDC) Stock Rallies 11% on Bernstein’s Bullish Upgrade to Outperform

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WDC Stock Card

Key Takeaways

  • Bernstein elevated Western Digital to Outperform from Market Perform, raising its price target from $170 to $340.
  • A sharp 21% decline followed concerns about Google’s TurboQuant compression technology — which Bernstein argues poses zero threat to hard drive demand.
  • The firm projects Western Digital and Seagate will achieve combined revenue growth of 24% CAGR between fiscal 2025 and 2030.
  • Western Digital announced an extended timeline for its ePMR technology, potentially indicating a delayed shift to HAMR drives.
  • Seagate remains Bernstein’s preferred stock in the segment, with its price target elevated to $620.

Despite recent volatility, Western Digital maintains a year-to-date gain of approximately 57%, showcasing resilience even through the latest correction.


WDC Stock Card
Western Digital Corporation, WDC

The stock plunge was triggered when Google Research introduced TurboQuant — an advanced compression method designed to optimize KV cache during AI inference operations. Market participants worried this innovation could reduce storage hardware demand.

Bernstein’s Mark Newman firmly rejected this narrative. “There is zero impact to HDD demand,” Newman stated in his research note. He emphasized that TurboQuant’s influence on NAND flash storage, utilized solely for offloading inactive caches, is minimal at best.

According to Bernstein, the market reaction was excessive and unwarranted. Western Digital had tumbled 21% from its recent peak before the analyst’s upgrade. Related companies including Seagate and Sandisk experienced similar pressure.

Upgraded Revenue Projections for Storage Industry

Bernstein has adopted a more constructive stance on the broader storage industry. The research firm now forecasts that Western Digital and Seagate will achieve a combined revenue compound annual growth rate of 24% spanning fiscal years 2025 through 2030.

This represents a substantial upgrade from earlier projections that anticipated 18.7% bits growth accompanied by 3.6% annual price erosion. The updated model incorporates 24% bits expansion with pricing holding steady.

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Newman pointed to several structural growth drivers: expanding AI computational workloads, increasingly sophisticated content production, extended data retention requirements, and strengthening data sovereignty regulations that support both volume growth and pricing power.

Regarding product developments, Western Digital’s 2026 Innovation Day revealed plans to extend its ePMR technology roadmap. The company essentially prolonged the lifecycle of its existing drive architecture by one to two additional years beyond prior expectations.

Questions About HAMR Rollout Timeline

The upgrade contains an important qualification. Newman interprets Western Digital’s continued emphasis on ePMR as an implicit indication that the company’s migration to heat-assisted magnetic recording — commonly referred to as HAMR — might be progressing slower than initially anticipated.

Bernstein’s financial model anticipates Western Digital will begin scaling HAMR production in 2027, representing approximately 5% of nearline exabyte shipments during that year.

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This contrasts sharply with Seagate’s trajectory, where Bernstein projects roughly 70% of nearline volume will utilize HAMR technology by 2027. Seagate continues as the firm’s preferred investment, with its price target increased to $620 from $500.

Western Digital shares climbed approximately 2.3% during Wednesday’s premarket session following the upgrade before accelerating gains throughout regular trading hours.

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Crypto World

US Law Firm Apologizes For AI Hallucinations in Filing

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US Law Firm Apologizes For AI Hallucinations in Filing

Sullivan & Cromwell’s Andrew Dietderich said the company has AI policies to prevent incorrect citations and other errors, but procedures weren’t followed on this occasion.

Wall Street law firm Sullivan & Cromwell has apologized to a federal judge after submitting a court filing that contained around 40 incorrect citations and other errors caused by AI hallucinations.

“We deeply regret that this has occurred,” Andrew Dietderich, co-head of Sullivan & Cromwell’s global restructuring team, wrote Friday in a letter to Chief Judge Martin Glenn of the US Bankruptcy Court for the Southern District of New York.

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“The Firm and I are keenly aware of our responsibility to ensure the accuracy of all submissions including under Local Bankruptcy Rule 9011-1(d), and I take responsibility for the failure to do so,” he said of an emergency motion filed nine days earlier.

Excerpt from Andrew Dietderich’s letter to Chief Judge Martin Glenn. Source: Sullivan & Cromwell

The incident highlights the risk AI tools can pose in high-stakes professional work without proper oversight. A database managed by legal technologist Damien Charlotin has recorded 1,334 incidents of AI hallucinations in court filings around the world, including more than 900 in the US.

Charlotin pointed out that most of these hallucinations involve fabricated citations, though AI-generated legal arguments have also occasionally been identified.

Dietderich said Sullivan & Cromwell has policies in place for the use of AI tools, which include a review of the citations it uses, but said the policies weren’t followed.

“Regrettably, this review process did not identify the inaccurate citations generated by AI, nor did it identify other errors that appear to have resulted in whole or in part from manual error.”

Sullivan & Cromwell is one of the largest law firms in the US by revenue, ranking 30th on the AmLaw Global 200. The firm also represented crypto exchange FTX in its bankruptcy case.

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Sullivan & Cromwell is conducting an internal investigation

Dietderich said the law firm took “immediate remedial measures,” including a full review of the circumstances that led to the errors. 

Related: Coinbase’s AI payments protocol x402 launches app store for AI agents

The firm is also “evaluating whether further enhancements to its internal training and review processes are warranted,” Dietderich said.

Dietderich also noted that the errors were spotted by a rival law firm.

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“I also called Boies Schiller Flexner LLP on Friday to thank them for bringing this matter to our attention and to apologize directly to them as well,” he said. 

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